As a matter of fact, if I remember correctly, the strange characters had something to so with the characters being changed during the copy/paste process...
A simple test that I run on my iPad.
Create a reply that you do not intend to send.
Type in I’m
Preview
You will get what you see here. I was trying to type I apostrophe m. No cut and paste.
I am betting Jim will have this fixed before we wake up tomorrow,
Cheers.